Samuel mendeniiall carlisle



No. 6l9,39l. Patented Feb. l4, I899. S. M. CABLISLE.

AUTOMATIC CYLINDER COCK.

(Application filed July 26, 1898.)

(N0 Modal.)

E NORRIS PEYERS co. PHOYQ-LrTNO.. WASHINGTON, n. cy

4 V V L Erica.

ATENT SAMUEL MENDENHALL OARLISLE, OF LOUISVILLE, KENTUCKY, ASSIGNOR TO NOBLE N. PRYOR, OF SAME PLACE.

AUTOMATIC CYLINDER-COCK.

SPECIFICATION forming part of Letters Patent No. 619,391, dated February 14, 1899. Application filed July 26,1898. Serial No. 686,974. (No model.)

To all whom it may concern.-

Be it known that I, SAMUEL MENDENHALL OARLISLE, a citizen of the United States, residing at Louisville,'in the county of Jefferson and State of Kentucky, have invented certain new and useful Improvements in Automatic Cylinder-Cocks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates in general to cylindercocks which are used to allow the escape of the water of condensation from steam-cylinders, and more particularly to that class 'of cylinder-cocks which are worked automatically by the operation of the piston in the cylinder.

The object of my invention is to provide a cylinder-cock of improved construction and one that is both automatic and noiseless in its operation.

A further object is to provide a construction by means of which both valves are held partly open when the engine is not in operation, thus allowing the water of condensation to escape from both sides of the piston. I

As shown in the accompanying drawings, in which like numerals of reference indicate corresponding parts in the specification, Figure 1 is a longitudinal vertical sectional view of my invention-with the valves at rest, and Fig. 2 is an end elevation showing one of the guides for the valve-stem.

In the drawings, 1 represents the casing of my improved cylinder-cock, said casing consisting of a main casing 2 and the caps3 3, screw-threaded in the ends of the main casing, thus forming valve-chambers 4 4B, the said valve-chambers being connected by a reduced portion 5, provided with an outlet 6. The central reduced portion 5 of the casing has valve-seats 8 8 formed at its ends. Pipes 7 7 connect the chambers 4 4 with the opposite ends of a steam-cylinder, by means of which the water of condensation passes into said chambers, thence into the central portion 5, and out through opening 6.

Passing centrally through the reduced portion 5 of the casing and extending into the valve-chambers on each side thereof is the valve-stem 9, having its ends slidably sup ported by guides or supports 10 10, hereinafter more fully described. Shoulders 11 11 are formed on the said valve-stem a slightlygreater distance apart than the length of the central portion 5. Abutting against said shoulders and screw-threaded on the said valve-stem are disk-valves 12 12, the inner edges of which are beveled inwardly to coincide with the outwardly-beveled edges of the central portion 5. Lock-nuts 13 13 are placed back of said valves for the purpose of securely holding them in place.

14: 14 represent coiled springs of equal tension around the valvestem 9 between the locknuts 13 13 and the valve-stem guides 10 10, thus forming cushions against which the valves operate, and preventing said valves being too forcibly thrown into their seats.

Formed in the inner surfaces of each of the valve-chambers 4. 4', between the main casing and the caps 3 3, is a channel or groove 15 15, into which is set the valve-stem guide 10 10 and firmly secured therein by means of the caps 3 3 being screwed thereupon. The said guides 10 10 are merely circular disks with openings in their faces and provided with a strengthened central portion having an opening through which the ends of the valve-stem slide.

The operation of my device is as follows: The steam is supposed to be entering the lefthand valve-chamber through the connectingpipe 7. The valve 12 will be forced against its seat 8, and at the same time spring 14 Will be compressed by the action of the valve-stem and the valve prevented from being too forcibly thrown against its seat. The valve 12 being thus forced from its seat, the Water of condensation is free to flow past said valve into the reduced portion 5 and through its outlet 6. At the next stroke of the engine the above action is reversed-that is, the valve 12 is forced against its seat 8 by the live steam, while the valve 12 is forced from its seat 8 and the spring 14 is compressed, making the valve 12' slide gently into its seat and allowing the Water of condensation to flow past valve 12 into the reduced portion 5 and out through opening 6. This reciprocating action is repeated at each stroke of the piston, and thereby automatically draining the cylinder.

In cylinder-cocks as heretofore constructed a great objection has been the noise made by the valves being thrown against their seats with great force, which forcible seating of the valves tends to break the valves from their stems and destroy the usefulness of the cylinder-cock in a very short time. My device entirely overcomes this objection. By means of suitably-arranged springs, which can be changed to suit engines of difierent pressure, the valves are made to gently strike their seats, and thus prevent noise and breakage.

Having thus described my invention, what I claim is ranged on the said valve-stem between the,

said valves and the said guides, whereby the valve being seated is'prevented from forcibly striking its seat by the depression of the spring on the other end of the valve-stem, substantially as set forth.

In testimony whereof I afiix my signature 30 in presence of two witnesses.

SAMUEL MENDENIIALL CARLISLE.

\Vitnesses:

JOHN M. LOCKHART, JOHN SMITH. 

